A stock tender offer is a public bid to buy shares directly from existing shareholders at a fixed price, by a stated deadline, subject to conditions the bidder spells out upfront. The price almost always sits above where the stock has been trading, and that premium is why you’re being asked. Your job is to decide whether the guaranteed cash is worth more to you than holding on.
The bid can come from an outside acquirer trying to take the company over, or from the company itself buying back its own stock. The mechanics are the same either way: you get an offer, you read the terms, and you either tender or you don’t.
How the Offer Is Built
The premium is the headline number. Offers commonly land 20% to 40% above the pre-announcement price, with research suggesting an average near 30%. Without that cushion, there’s little reason to sell on the bidder’s schedule rather than through the open market on your own.
Every tender offer must stay open for at least 20 business days from the date it is first published or sent to shareholders. That gives you roughly a calendar month to read the materials, see what the board says, and talk to an advisor. If the bidder raises the price or changes the percentage of shares it wants, the clock resets and the offer must remain open for at least 10 more business days from the date of that change.1eCFR. 17 CFR 240.14e-1 – Unlawful Tender Offer Practices
Most offers come with conditions. The important one is usually a minimum tender condition: the bidder will only buy if enough shareholders participate, often a majority of outstanding shares. Other common conditions include antitrust clearance and the absence of a major deterioration in the target’s financial condition during the offer window.
You can change your mind. Withdrawal rights let you pull back shares you’ve already tendered, right up to the expiration date. Once the deadline passes and the bidder announces that all conditions are met, it accepts the tendered shares and pays promptly.1eCFR. 17 CFR 240.14e-1 – Unlawful Tender Offer Practices
After the initial deadline, the bidder can open a subsequent offering period of at least three business days, giving latecomers another chance. One important catch: withdrawal rights do not apply during that window.2eCFR. 17 CFR 240.14d-11 – Subsequent Offering Period If you tender then, you’re locked in.
Who’s Bidding and for How Much
A friendly offer is one the target’s board has negotiated and recommends to shareholders. The merger agreement is usually signed before the offer launches, and the board’s endorsement makes success much more likely.
A hostile offer goes straight to shareholders over the board’s objection. Whether a hostile bid works typically comes down to the size of the premium and whether large institutional holders find the price compelling enough to override the board.
Any-and-All vs. Partial Offers
An any-and-all offer seeks every outstanding share, subject to the minimum acceptance threshold. If the threshold is met, the bidder buys everything that was tendered.
A partial offer seeks only a specific percentage, often just enough for majority control. Partial offers introduce proration. If the bidder wants 50% of shares and 75% are tendered, the bidder buys proportionally from each tendering shareholder, so only about two-thirds of your tendered shares would actually be purchased at the offer price. The rest stay in your account, and they may trade at a lower price after the offer closes. This is where most shareholders miscalculate: tendering into a partial offer rarely means selling your entire position.
Mini-Tender Offers
A mini-tender offer seeks less than 5% of a company’s outstanding shares.3Investor.gov. Mini-Tender Offers Because it falls below the threshold that triggers full SEC filing and procedural requirements, it doesn’t carry the same disclosure protections or guaranteed withdrawal rights that apply to larger offers.4U.S. Securities and Exchange Commission. Commission Guidance on Mini-Tender Offers and Limited Partnership Tender Offers The SEC has warned investors to treat these with extra caution. Some come in at or even below market price, counting on shareholders to accept without reading the fine print.
The Two Filings You Should Read
The SEC regulates tender offers primarily through Regulation 14D, which covers third-party bids for public companies, and Regulation 14E, which applies to all tender offers including a company’s own self-tender.5eCFR. 17 CFR Part 240 Subpart A – Regulation 14D Two documents matter most for your decision.
Schedule TO (The Bidder’s Statement)
When a tender offer begins, the bidder files a Schedule TO with the SEC. It lays out who the bidder is, where the money is coming from, what they plan to do with the company after the acquisition, and the exact terms. If news coverage conflicts with the Schedule TO, the filing controls.
Schedule 14D-9 (The Target Board’s Response)
The target company’s board must publish its position within 10 business days of when the tender offer begins. This Schedule 14D-9 tells you whether the board recommends accepting, rejecting, or remaining neutral.6eCFR. 17 CFR 240.14d-9 – Recommendation or Solicitation by the Subject Company Most 14D-9 filings include a fairness opinion from an independent financial advisor estimating the intrinsic value of the shares. Read that section closely. It gives you a professional view of whether the offered price is actually fair.
Equal Price for Everyone
Rule 14d-10 requires that the tender offer be open to every holder of the targeted class of stock and that the highest price paid to any shareholder be paid to all shareholders.7eCFR. 17 CFR 240.14d-10 – Equal Treatment of Security Holders Side deals with large holders at a better price aren’t allowed. Everyone receives the same per-share amount.
Deciding Whether to Tender
Start with the board’s recommendation. If the board says the offer undervalues the company, they’re signaling that intrinsic value exceeds the bid. Boards sometimes reject an initial offer specifically to draw out a higher competing bid, and a bidding war almost always benefits shareholders. If the board recommends acceptance, they’re telling you this is likely the best price you’ll see.
Then assess closing risk. Look at the conditions in the Schedule TO. A high minimum tender threshold, say 90% of outstanding shares, means the offer needs near-universal participation and could fail if enough holders sit it out. Pending antitrust review can delay or kill a deal. If the offer fails, the stock usually drops back toward its pre-announcement level, and the wait earned you nothing.
For partial offers, estimate the proration. If the bid is for 40% and commentary suggests heavy oversubscription, only a fraction of your shares will be bought at the premium. The rest sit in your account at whatever price the market settles on afterward. Factor both pieces into your return.
Finally, run the tax numbers before you commit.
Taxes on a Tender
Selling shares into a tender offer is a taxable event. The IRS treats the proceeds the same as any other stock sale: the difference between what you receive and your cost basis is a capital gain or loss.
Long-Term vs. Short-Term
Shares held more than one year qualify for long-term capital gains rates. For 2026, those rates are 0%, 15%, or 20%, depending on taxable income. Single filers pay 0% on long-term gains up to $49,450 in taxable income, 15% from there up to $545,500, and 20% above that. Joint filers hit the 15% bracket at $98,900 and the 20% bracket at $613,700.
Shares held one year or less generate short-term capital gains, taxed at your ordinary income rate, which runs as high as 37% in 2026. If you bought shares at different times, each lot carries its own holding period, so the hit depends on which specific shares you tender.
Net Investment Income Tax
Higher-income shareholders also owe the 3.8% net investment income tax on capital gains. It applies once modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.8Internal Revenue Service. Net Investment Income Tax Those thresholds don’t adjust for inflation. Combined with the 20% long-term rate, the effective maximum federal rate on capital gains reaches 23.8%.
When a Self-Tender Can Be Taxed as a Dividend
When the company itself buys back shares through a tender offer, the tax treatment is not automatic. Under the Internal Revenue Code, a corporate stock redemption qualifies for capital gain treatment only if it meets one of several tests: the redemption substantially reduces your ownership percentage, it completely terminates your interest in the company, or it is not essentially equivalent to a dividend.9Office of the Law Revision Counsel. 26 U.S. Code 302 – Distributions in Redemption of Stock If none of those tests are met, the IRS can reclassify the entire payment as a dividend, which changes the math considerably. For most shareholders tendering all their shares back to the issuer, the complete termination test is straightforward. But if family members also hold shares, constructive ownership rules can attribute their shares to you, making it look like you still hold an interest even after tendering.
Backup Withholding
If you fail to provide a certified Taxpayer Identification Number to the depositary, federal backup withholding kicks in on your payment.10Office of the Law Revision Counsel. 26 U.S. Code 3406 – Backup Withholding The current rate is 24%. You recover the amount when you file your return, but a chunk of your proceeds is tied up in the meantime. Confirming your broker has your correct TIN on file avoids it.
How to Actually Tender Your Shares
The bidder appoints a depositary, usually a major bank or trust company, to receive and process tendered shares. How you submit depends on how you hold the stock.
Shares in a Brokerage Account
If your shares sit in a brokerage account, which covers most retail investors, contact your broker, say you want to tender, and specify how many shares. The broker submits electronically through the depositary. Most brokers charge no fee, but confirm. Your broker may need the instruction a day or two before the expiration date to process it in time, so don’t wait until the last hour.
Physical Stock Certificates
If you hold paper certificates, you complete a Letter of Transmittal, included in the offer materials, and mail it with your certificates to the depositary. Your signature must carry a medallion signature guarantee, a special authentication that verifies you as the certificate’s owner.
Getting one requires an in-person visit to a bank, credit union, or brokerage firm that participates in a recognized medallion program. Many institutions provide it at no cost to existing customers; non-customers may pay a small fee. Bring a government-issued photo ID and the transaction documents. Some institutions require that you’ve had an account with them for a minimum period before they’ll sign. Without a valid guarantee, the depositary rejects the submission, so build this step into your timeline well before the deadline.
What Happens If You Don’t Tender
Choosing not to tender rarely means you get to keep your shares indefinitely. Most acquisitions are structured as two-step transactions. Step one is the tender offer. Step two is a follow-up merger that squeezes out any shareholders who didn’t participate. In that merger, your shares are automatically converted into the right to receive the merger consideration, typically the same cash price per share that was offered in the tender.
You don’t necessarily get a vote. Under the corporate laws governing most publicly traded companies, an acquirer holding 90% or more of a company’s stock can complete a short-form merger without any shareholder vote at all. Even below that threshold, many corporate statutes allow the acquirer to close the merger without a separate vote once it holds a majority of shares acquired through the tender offer.
So the practical result is this: holdout shareholders usually end up receiving the same per-share price as those who tendered, just later, after the back-end merger closes. The main difference is timing of the cash.
One narrow exception. In some states, shareholders squeezed out in a back-end merger have the right to seek a judicial appraisal of their shares. Appraisal rights let you ask a court to determine the “fair value” of your stock, which may be higher or lower than the merger price. Pursuing appraisal is expensive, time-consuming, and uncertain, and it is primarily used by institutional investors and activist funds rather than individuals. It exists if you believe the offered price dramatically undervalues the company.
If the offer fails because conditions weren’t met, nothing changes. Your shares remain in your account, the stock price typically falls back toward its pre-offer level, and any shares you tendered that were not accepted are returned to you or your broker.